Furniture with interwoven tab and slot joint
A joint for furniture uses alternating tabs and slots formed along an edge of first and second furniture panels. The panels are joined together so that tabs in the first panel are disposed in slots in the second panel and tabs in the second panel are disposed in slots in the first panel. This arrangement causes the slots to flex outwardly and the tabs to flex inwardly once assembled and creates residual stress in the assembled joint which stiffens the joint.
The present application claims the benefit of U.S. Provisional Application Ser. No. 62/568,415, filed Oct. 5, 2017, which is herein incorporated by reference in its entirety.
THE FIELD OF THE INVENTIONThe present invention relates to furniture. In particular, examples of the present invention relate to a modular furniture joint which allows for tool-less assembly and increased stability.
BACKGROUNDMany persons desire modular furniture. Modular furniture is often assembled by the end user from flat pieces and is thus easy to store and transport in the un-assembled form. Modular furniture often suffers from instability, and in some instances modular furniture is made overly complex or uses more permanent fastening or construction methods to stabilize the furniture. This, however, makes the furniture more cumbersome for the end user and reduces some of the portability and ease of use associated with this type of furniture. Additionally, the use of fasteners such as screws or nails to stabilize the furniture is often problematic in the long term as these fasteners become loose with use and movement of the furniture.
Non-limiting and non-exhaustive examples of the present invention are described with reference to the following figures, wherein like reference numerals refer to like parts throughout the various views unless otherwise specified.
Corresponding reference characters indicate corresponding components throughout the several views of the drawings. Unless otherwise noted, the drawings have been drawn to scale to facilitate understanding of the invention. Skilled artisans will appreciate that elements in the figures are illustrated for simplicity and clarity. For example, the dimensions of some of the elements in the figures may be exaggerated relative to other elements or figures to help to improve understanding of various examples of the present invention. Also, common but well-understood elements that are useful or necessary in a commercially feasible embodiment are often not depicted in order to facilitate a less obstructed view of these various embodiments of the present invention.
It will be appreciated that the drawings are illustrative and not limiting of the scope of the invention which is defined by the appended claims. The examples shown each accomplish various different advantages. It is appreciated that it is not possible to clearly show each element or advantage in a single figure, and as such, multiple figures are presented to separately illustrate the various details of the examples in greater clarity. Similarly, not every example need accomplish all advantages of the present disclosure.
DETAILED DESCRIPTIONIn the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It will be apparent, however, to one having ordinary skill in the art that the specific detail need not be employed to practice the present invention. In other instances, well-known materials or methods have not been described in detail in order to avoid obscuring the present invention.
In the above disclosure, reference has been made to the accompanying drawings, which form a part hereof, and in which is shown by way of illustration specific implementations in which the disclosure may be practiced. It is understood that other implementations may be utilized and structural changes may be made without departing from the scope of the present disclosure. References in the specification to “one embodiment,” “an embodiment,” “an example embodiment,” etc., indicate that the embodiment described may include a particular feature, structure, or characteristic, but every embodiment may not necessarily include the particular feature, structure, or characteristic. Moreover, such phrases are not necessarily referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, such feature, structure, or characteristic may be used in connection with other embodiments whether or not explicitly described. The particular features, structures or characteristics may be combined in any suitable combination and/or sub-combinations in one or more embodiments or examples. It is appreciated that the figures provided herewith are for explanation purposes to persons ordinarily skilled in the art.
The disclosure describes how an article of furniture may be constructed using one or more joints between adjacent furniture panels which include interlocking tabs and slots. The tabs and slots are arranged so that multiple tabs and slots are formed on first and second panels of a furniture joint. The first panel and the second panel each have both tabs and slots which engage corresponding tabs or slots on the other panel and flex to allow all of the tabs to engage the corresponding slot. The tabs and slots may be formed on fingers which are part of the first panel and second panel. The panels may be cut inwardly from the joint edge to form fingers, and the tabs and slots may be formed near the ends of the fingers. The use of fingers increases the flexibility of the panels and the ease of assembling the resulting article of furniture.
A first panel 14 is formed with both slots 22 and tabs 26 along an edge of the first panel 14. The slots 22 and tabs 26 are disposed in an alternating pattern along the edge of the first panel 14. The first panel 14 also includes cuts 46 which extend inwardly from the edge of the first panel 14 between adjacent slots 22 and tabs 26 and form a series of fingers 50. Each finger 50 is associated with a slot or tab. The cuts 46 and resulting fingers 50 isolate adjacent slots 22 or tabs 26 from each other somewhat and increase the flexibility of the first panel 14. The cuts 46 and fingers 50 increase the ease with which the first panel 14 is bent out of plane at a slot 22 or tab 26 in order to engage the second panel 18. The length of the slots 46 and the width of the resulting fingers 50 may be altered according to the size of the resulting crate 10 and the material used for the first panel 14 and second panel 18. For common furniture baskets, ¼ inch or ⅜ inch birch plywood is commonly used for the first panel 14 and second panel 18. This works well with fingers 50 which are between about 2 inches and 3 inches wide and between about 4 inches and about 5 inches long. The length of the cuts 46 and fingers 50 are thus between about 1 and about 3 times the width of the fingers. Thicker material may benefit from longer or narrower fingers 50. Thinner material may benefit from wider or shorter fingers 50.
A second panel 18 is also formed with both slots 38 and tabs 42 along an edge of the second panel 18 in an alternating pattern. The second panel 18 also includes cuts 46 which extend inwardly from the edge of the second panel 18 between adjacent slots 38 and tabs 46 and form a series of fingers 50. Each finger 50 is also associated with a slot 38 or tab 42. The cuts 46 isolate adjacent slots 38 or tabs 42 from each other and increase the ease with which the second panel 18 is bent out of plane at a slot 38 or tab 42 while assembling the first panel 14 and second panel 18 into a joint. The length of the cuts 46 and fingers 50 are thus between about 1 and about 3 times the width of the fingers, and often about 2 times the width of the fingers, and are often about 2 times the width of the fingers.
A joint is formed between the first panel 14 and the second panel 18. The first panel 14 and second panel 18 are formed so that a tab 26 on the first panel 14 is disposed adjacent a slot 38 on the second panel 18 and so that a tab 42 on the second panel 18 is disposed adjacent a slot 22 on the first panel 14 while assembling the joint. In the assembled joint, the fingers 50 with the slots 22, 38 are elastically bent outwardly relative to their respective panel and the fingers 50 with the tabs 26, 42 are elastically bent inwardly relative to the adjacent slotted fingers of that panel. The tabs 26, 42 on each panel 14, 18 are placed into the respective slots 22, 38 on the other panel to assemble the joint.
The fingers 50 remain elastically bent inwardly or outwardly in the assembled joint. The fingers 50 with the slots 22, 38 are urged inwardly over the tabs 26, 42 and against the end of the finger 50 by this residual bending. The fingers 50 with the tabs 26, 42 are urged outwardly so that the tabs 26, 42 are urged against the sides of the slots 22, 38 by this residual bending. This places the assembled joint under tension and uses the elastic bending of the fingers 50 to hold the tabs 26, 42 in the slots 22, 38 and remove slop from the joint and from the assembled piece of furniture.
The storage crate 10 also includes a bottom panel 54 (
A finger 50 with the tab 26 has the tab 26 located along the width of the finger to match the position of the slot 38 (in the second panel 18) which will receive the finger 22. In the example shown, the tab 26 is centered in the finger 50. The distal portion of the finger 50 next to the tab 26 is cut square with the end of the finger 50 forming a shoulder 66 adjacent the tab 26. The face of a slotted finger 50 of the second panel 18 rests against this shoulder 66 in an assembled joint. As shown, the corners between the tab 26 and the shoulder 66 may be undercut somewhat to allow for automated cutting with a cnc router. While the slot 38 could be made longer instead, the undercut corner results in a joint with less slop.
In cutting the panels 14, 18, the width of the tabs 26, 42 and the length of the slots 2,2 38 may vary, but tabs 26, 42 which are between about 0.5 and 1.5 inches wide work well for commonly sized furniture crates or baskets. The width of the slots 22, 38 is selected to be slightly greater than the thickness of the panel material to allow the tabs 26, 42 to be inserted easily. As can be seen above, the tabs 26, 42 may be at a small angle when inserted into the slots 22, 38 and having a degree of clearance in the width of the slot 22, 38 will ease insertion of the tab 26, 42. The slot 22, 38 may be between about 0.01 and 0.03 inches wider than the thickness of the panel material. The flexing of the panels 14, 18 and fingers 50 in the assembled joint will remove play from the assembled joint even if the slots 22, 38 have some clearance around the tabs 26, 42. In this manner, the furniture joint is advantageous as it easily accommodates the variation in actual thickness for a panel material of nominal thickness.
The joint can also be used to create a variety of furniture pieces including case goods (bookshelves, dressers, night stands, cabinets) as well as other furniture. For example, a box such as the crate 10 shown may be placed on its side with the top opening facing forwards and a shelf may be placed across the middle of the box parallel to a first panel 14 or a second panel 18 to create a small shelf. This same construction may be used in the orientation shown previously to create a box or basket with a divider panel. The woven finger joint shown herein may thus be used to create aesthetic variation in different items of furniture.
The above description of illustrated examples of the present invention, including what is described in the Abstract, are not intended to be exhaustive or to be limitation to the precise forms disclosed. While specific examples of the invention are described herein for illustrative purposes, various equivalent modifications are possible without departing from the broader scope of the present claims. Indeed, it is appreciated that specific example dimensions, materials, etc., are provided for explanation purposes and that other values may also be employed in other examples in accordance with the teachings of the present invention.
Claims
1. An item of furniture comprising:
- a first panel comprising: a first side; a cut which extends into the first panel from the first side to form a first finger and a second finger; a first tab formed on an end of the first finger; a first slot formed adjacent an end of the second finger;
- a second panel comprising: a first side; a cut which extends into the second panel from the first side to form a first finger and a second finger; a second tab formed on an end of the second panel first finger; a second slot formed adjacent an end of the second panel second finger;
- wherein the first panel and the second panel are connected together to form a joint such that: the first panel is disposed at an angle to the second panel; the first side of the first panel is disposed adjacent the first side of the second panel; the first finger and second finger of the first panel are elastically bent; the first finger and second finger of the second panel are elastically bent; the first tab is disposed in the second slot; and the second tab is disposed in the first slot.
2. The item of furniture of claim 1, wherein the first panel is disposed generally perpendicular to the second panel.
3. The item of furniture of claim 1, wherein the first panel first finger comprise a first shoulder formed on an end thereof adjacent the first tab, wherein the first shoulder is disposed adjacent a face of the second panel first finger, wherein the second panel second finger comprise a second shoulder formed on an end thereof adjacent the second tab, and wherein the second shoulder is disposed adjacent a face of the first panel second finger.
4. The item of furniture of claim 1, wherein the first panel comprises at least three fingers with alternating tabs and slots on the fingers, and wherein the second panel comprises at least three fingers with alternating slots and tabs on the fingers, wherein tabs on the first panel are placed in corresponding slots on the second panel, and wherein tabs on the second panel are placed in corresponding slots on the first panel.
5. The item of furniture of claim 1, wherein the first panel first finger comprise a first shoulder formed on an end thereof adjacent the first tab, wherein a line along the first shoulder is parallel to a line along an inside edge of the first slot, wherein the first shoulder is disposed farther from a center of the first panel than the line along the inside edge of the first slot, wherein the second panel second finger comprise a second shoulder formed on an end thereof adjacent the second tab, wherein a line along the second shoulder is parallel to a linen along an inside edge of the second slot, and wherein the second shoulder is disposed farther from a center of the second panel than the line along the inside edge of the second slot.
6. The item of furniture of claim 1, wherein the first panel second finger is wider than the first panel first finger, wherein the second panel first finger is wider than the second panel second finger, wherein a side edge of the first panel second finger contacts a side edge of the second panel first finger, and wherein a side edge of the first panel first finger does not contact a side edge of the second panel second finger.
7. The item of furniture of claim 1, wherein a length of each of the fingers is between about 1 times and about 3 times a width of each of the fingers.
8. The item of furniture of claim 1, wherein the first panel and the second panel form sides of a furniture box, and wherein a third panel is connected to the first panel and is connected to the second panel and is disposed generally perpendicular to the first panel and generally perpendicular to the second panel.
9. An item of furniture comprising:
- a first panel comprising: a first side having a first finger and a second finger extending therefrom; a first tab formed on an end of the first finger; a first slot formed adjacent an end of the second finger;
- a second panel comprising: a first side having a first finger and a second finger extending therefrom; a second slot formed on an end of the second panel first finger; a second slot formed adjacent an end of the second panel second finger;
- wherein the first panel and the second panel are connected together to form a joint such that: the first side of the first panel is disposed adjacent the first side of the second panel; at least one of the first finger and the second finger of the first panel is elastically bent; at least one of the first finger and second finger of the second panel is elastically bent; the first tab is disposed in the second slot; and the second tab is disposed in the first slot.
10. The item of furniture of claim 9, wherein the first panel is disposed at an angle to the second panel.
11. The item of furniture of claim 9, wherein the first panel comprises a cut which extends into the first panel from the first side to form the first finger and the second finger, and wherein the second panel comprises a cut which extends into the second panel from the first side to form the first finger and the second finger.
12. The item of furniture of claim 9, wherein the first panel is disposed generally perpendicular to the second panel.
13. The item of furniture of claim 9, wherein the first panel first finger comprise a first shoulder formed on an end thereof adjacent the first tab, wherein the first shoulder is disposed adjacent a face of the second panel first finger, wherein the second panel second finger comprise a second shoulder formed on an end thereof adjacent the second tab, and wherein the second shoulder is disposed adjacent a face of the first panel second finger.
14. The item of furniture of claim 9, wherein the first panel comprises at least three fingers with alternating tabs and slots on the fingers, and wherein the second panel comprises at least three fingers with alternating slots and tabs on the fingers, wherein tabs on the first panel are placed in corresponding slots on the second panel, and wherein tabs on the second panel are placed in corresponding slots on the first panel.
15. The item of furniture of claim 9, wherein the first panel first finger comprise a first shoulder formed on an end thereof adjacent the first tab, wherein a line along the first shoulder is parallel to a line along an inside edge of the first slot, wherein the first shoulder is disposed farther from a center of the first panel than the line along the inside edge of the first slot, wherein the second panel second finger comprise a second shoulder formed on an end thereof adjacent the second tab, wherein a line along the second shoulder is parallel to a linen along an inside edge of the second slot, and wherein the second shoulder is disposed farther from a center of the second panel than the line along the inside edge of the second slot.
16. The item of furniture of claim 9, wherein the first panel second finger is wider than the first panel first finger, wherein the second panel first finger is wider than the second panel second finger, wherein a side edge of the first panel second finger contacts a side edge of the second panel first finger, and wherein a side edge of the first panel first finger does not contact a side edge of the second panel second finger.
17. The item of furniture of claim 9, wherein a length of each of the fingers is between about 1 times and about 3 times a width of each of the fingers.
18. The item of furniture of claim 9, wherein the first panel and the second panel form sides of a furniture box, and wherein a third panel is connected to the first panel and is connected to the second panel and is disposed generally perpendicular to the first panel and generally perpendicular to the second panel.
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Type: Grant
Filed: Oct 4, 2018
Date of Patent: Feb 14, 2023
Patent Publication Number: 20190107131
Inventor: Clark Davis (Genola, UT)
Primary Examiner: Jose V Chen
Application Number: 16/151,808
International Classification: F16B 5/00 (20060101); A47B 47/00 (20060101); B65D 25/30 (20060101); B65D 6/02 (20060101); B65D 6/34 (20060101); F16M 11/24 (20060101); F16B 12/46 (20060101);